cop a feel vs make it

cop a feel

verb
  • To stealthily fondle someone in a sexual manner. 

make it

verb
  • To have sexual intercourse; do it. 

  • Used other than figuratively or idiomatically: see make, it. 

  • To succeed in doing something, for example in reaching a place, going somewhere, attending an event, arriving in time for something, adding to one's schedule or itinerary, or in getting where one wants to be in one's life or career, which sometimes means becoming or wanting to become successful (succeed in a big way) or famous. 

  • To succeed in surviving, in living through something. 

How often have the words cop a feel and make it occurred in a corpus of books? (source: Google Ngram Viewer )